Windows 10 ‘Redstone 4’ test build adds some Windows Defender security tweaks By March 13, 2018wordpress Microsoft is continuing to polish its coming Windows 10 release with Fast Ring Insider Build 17120 as it heads toward the finish line. Read More » Related posts: Windows 10 ‘Redstone 4’ test build adds some Windows Defender security tweaks Windows 10 ‘Redstone 4’ test build adds some Windows Defender security tweaks Microsoft releases new Windows 10 preview with snipping, Sets, Fluent, security, and gaming improvements Hands-on with the first Windows 10X developer preview build – Windows Central